Calculating-machine.



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L. I. DARBY & C. N. WALSH.

CALCULATING MACHINE.. APPLICATION FILED DER-4,1912.

1,155,048. Patentedsept. 28, 19-15.:

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Patented Sept. 28

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CALCULATING MACHINE.

APPLICATION FILED DEC. 4. 1912.

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L. l. DARBY & C. N. WALSH. CALCULATING MACHINE APPLICATION FILED DEC. 4, 1912. 1,155,048. PatentedSept. 28, 1915.

L. I. DARBY & 0-. N. WALSH.

CALCULATING MACHINE.

APPLICATION FILED DEC. 4. 1912.

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CALCULATING MACHINE.

APPLICATION FILED \DEC. 4, 1912.

Patented Sept. 28, 1915,

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CALCULATING MACHINE. APPLICATION FILED DEC. 4, 1912.

Charles Nfizsfalah Z; @W 4Q EM -M ATTORNEYS @Levl LEE-lb] I L. I. DARBY &' C. N. WALSH.

CALCULATING MACHINE.

APPLICATION FILED DEC.4.1912.

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- county of Essex and State'of New UNITED STATES PATENT OFFICE- IJ EVI I. DARBY, OF NEWARK, AND CHARLES N. WALSH, OF EAST ORANGE, NEW JERSEY,

ASSIGNORS T0 DARBY MACH FNE COMPANY, A CORPORATION OF NEW JERSEY.

CALCULATING-MACHINE.

Specification of Letters Patent.

Patented Sept. 28, 1915.

Application filed December 4, 1912. Serial No'. 734,856.

b all to 710m, it may concern Be it known thatwe, Lnvr I. DARBY and GI-rARLEs N. WALSH, both citizens of .the United States, residing at Newark, in the Jersey,-

and at East Orange, county of Essex, and

State of New Jersey, respectively, have in 'ventedcertain new and useful Improvements in Calculating-Machines; and we do hereby declare the following to be a full,-

clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to characters of reference marked thereon, which form a part of this specification.

Thpresent invention has reference, generally, to improvements in calculating machines; and, this invention relates, more particularly, to a machine or apparatus of the general character hereinafter setforth,

may, at the will of'the operator, be rotated which can be used primarily as a substracting machine, but which may also be used as a combined adding and subtracting machine,

for registering and recording figures, and comprising a series of numbered disks which in forward or backward directions, so that the same can be used as an adding machine,

or as asubtrac'ting machine, or as a combined adding and subtracting machine.

The present invention, therefore, has for its principal object to provide apparatus of the character vention has for its further object to a machine in which the mechanism, when used for adding purposes is positively locked against the movement of the parts for subtracting purposes, and vice versa, the mechdisk in a forward direction, when using the machine as an adding machine, another'key being employed to prevent movement of the released number-bearing disk in its forward direction, but moving said disk in its backward direction upon the release and return a machine or herein-above stated, the mechanism of which is simple and operates mostefficiently; and, the in provide of the depressed key to its normal initial position, whereby the machineserves as a subtracting machine, the figures meanwhile being printed by suitable mechanism upon a strip of paper.

The invention has for its further purpose to improve that class of adding machines more particularly described and illustrated in Letters Patent No. 1,068,38i of July 22, 1913, whereby the machine shown in said Letters Patent by the arrangement of a most simple mechanism is also adapted for use as a subtracting machine.

Other objects of this invention not at this time more particularly enumerated will be clearly obvious from the following detailed description of the present invention.

With the various objects of the present invention in view, the said invention consists, primarily, in the novel subtracting machine hereinafter set forth; and, the invention consists, furthermore, in the general arrangements and combinations of the various devices and parts, as well as in the details of the construction of the same, all of which will be more fully described in the following specification, and'then finally embodied in the clauses of the claim which are appended to and which form an essential part in the direction of the arrow w in said Fig.

1. Fig. 3 is an enlarged longitudinal vertical section of the machine, showing the various devices and parts in their normal initial positions, said section being taken on line 3-3 in said Fig. 1, looking in the di rection, of the arrow y; and Fig. 1 is similar sectional representation of the said de vices and parts illustrated in said Fig. 3,. showing the relative positions of the parts ofthe mechanism and of the actuated numbering disk in a forward direction or in the 'direction of the arrow 9 in said Fig. 4, during the adding operation of the machine.

Fig. 5 is an enlarged longitudinal vertical section of the machine, similar to that represented in said Fig. 3, and taken in a vertical plane on the same line 33 in Fig. 1, illustrating the first or initial ,operation of certain parts of the mechanism, when the machine is used for subtracting purposes; and Fig. 6 is a longitudinal vertical section of the machine, similar to that represented in Fig. '1', showing the relative positions of the parts of the mechanism and of the actuated numbering disk in a backward direction, or in the direction of the arrow 2 in said Fig. 6, during the subtracting operation of the machine. Fig. 7 is an enlarged detail elevation of the key-actuated releasing and setting machanism for bringing certain parts of the general mechanism into their released orset relations for permitting the use of 'the numbering disk or disks for subtracting purposes, the parts represented in said Fig. 7, being shown in their normal initial positions; and Fig. 8 is a similar view of the parts represented in said. I 7, but illustrating the said parts in their operated relations. Fig. 9 is a detail longitudinal vertical section, on an enlarged scale, said section being taken on line 99 in Fig. 1, looking in the direction of the arrow at. Fig. 10' is a detail transverse vertical section, also on an enlarged scale, said section being taken on line 10-l0 in Fig. 3; and Fig. 11 .is a similar section, said section being taken on line 1l-11 in Fig. 6.

Similar characters of reference are employed in all of the above described views, to indicate corresponding parts.

Before setting forth in detail the particular construction of the several devices and their various parts which embody the principal features oi the (mlculating machine as a. subtracting machine illustrated in the accompanying drawings, we will state that while the subtracting mechanism is adapted admirably in connection with an adding machine 01 the general character set forth more particularly in said LettersPatent, No. 1.008384, still it will be understood that the principles of the present invention may be applied also to other forms of adding machines. The present invention being described in this application in connection with the form. of adding machine described and illustrated in said Letters Patent, No. 1,068,381, certain devices and parts of the mechanism comprising the said adding machine are omitted from the drawings of the present application, and for the description of these' devices and parts, in so far as they have any bearing to the mechanism in connection with the subtracting machine of the present application, the drawings and description of Letters Patent No. 1,068,381 should he referred to.

end a finger-pieced.

Referring now to the several figures of the drawings accompanying the 'n'esent application, the reference-character 1 indicates a suitably formed base-plate which is provided at or near itstront edge with suitably disposed bearing-posts or members 2 and 3 in which'is suitablymounted a laterally extending and non-rotative rod l. Pivotally mounted upon'said rod 4- area suitable number of digit-indicating key-levers, as 5, of which there are always ten, each keylever being provided with an upwardly extending arm (3 which carries upon its upper These finger pieces are respectively provided with the several digit-representing symbolsl), 1, 2, 3,}, 5, (5, 7, Sand 9. The return of these key levers 5 to their normal initial positions, atter deprcssion,,is produced by means of suitably arranged coiled springs, as 8, said sprii'igs having their free ei'id-portious in'hoh ng engagement with suitable-pins or projections 10 which extend from th sides of the said key-levers, near the pivoted end-por-.

tions of said levers, and the other free endportions 11 of said springs '8 resting in suitably disposed slots 13 of a. suitable springholder 12, suitably secured upon the baseplate 1, as indicated in Fig. 1 of the drawings. To limit the return-action ot the said springs, and the corres mnding return-movements of the said key-levers 5. suitable posts ll are secured upon the said base-plate 1, the said posts being connected by means of a bar or rod 15, at a point above the said key levcrs, and against which the depressed key-lever is returned by the action of the corresponding spring 11, so as to arrest its returning movement in an upward direction and to stop the key-lever in its proper place. Referring now more particularly to said Fig. 1 of the drawings, it will be seen that the set of depressible keys, located at the right hand side of the machine, and as shown in said former Letters Patent No. 1,068,384, and which are used for actuating the laterally movable releasing or setting carriage, are omitted from the drawings of the present application; and, likewise, the

ing arms 16 which are connected Iligtll. the

ends where the said arms are pivotally -mounted upon the rod 4 by means of a later shaped extensions or lugs, as 19, and each extens on or lug 19 being provided with a rearw rdly extending finger 20 The said rock-frame is moved in its downward direction, by the depression of any one of the said digit-bearing key-levers 5, in the manner of said former Letters Patent No. 1,068,384, and the rock-frame after it has been depressed is returned upwardly into its normal positiomby means of end springs 21 which encircle the said rod 4, similar to the previously-mentioned springs 3, and the free end-portions of which engage, respectively, with suitable "projections or pins, as 22, which extend from the sides of the arms 16, near the pivoted end-portions thereof, and with the previously-mentioned springholder 12.

The reference-character 23 indicates a series of vertically disposed posts, extending upwardly from a bar 24 which is suit ably secured upon the base-plate l of the apparatus'or machine, and slidably arranged upon each post 23 is a slide. Each slide consists, essentially, of a main body 25 which is provided with forwardly eX- tending and perforated ears or guide-lugs 26 which embrace the post 23 in such a manner, that each slide'is slidably mounted upon a post 23. Extending through each post 23 is a pin ,27, the purposes of said pins being to limit the upward movements of said slides upon the respective posts.

The body 25 of each slide-is also provided .with a laterally projecting lug 28, and eX- tending rearwardly from each'lug 28 is a projection, or pin 29. adapted'at the .proper time to be engaged by a suitable arm or finger of the previous]y'mentioned laterally moving releasing or setting carriage, not here shown, and operating in the manner specified in said Letters Patent No. 1,068,384. Projecting laterally from the body-portion of each slide is a lug 30 which is provided with a forwardly extending finger 31. Each body-portion 25 is also provided with a perforated ear or lug 32, into and through which extends the upper end-portion of an upright or vertically disposed spring-rod 33, each spring-rod 33 having its lower end-portion permanently fixed to the previously-mentioned bar 24. Directly back of said, series of posts 23, and longitudinally. of the machine in alinement with said-posts 23, is a second series of posts, as 34, the said'posts' 34 being also secured at theirlower end-portions to the said base or plate 24. The said posts 34: are shorter than the posts 23, and at their upper end-portions the said posts 3-l are cut away, so as to form off-sets or seats, as 35, ,into resting engagement with which, under normal conditions, the spring-rods 33 force the said perforated ears or lugs when the said slides are intheir-normally raised positions, so as to support the said slides in their raised and inactive positions upon their respective rods, and thus retain the said slides in a slightly-"angular relation with respect to asingle vertical plane passing through each axis of the several posts 23, and longitudinally of the apparatus or machine. The body 25 of each slide is further provided with a rearwardly' eiztending lug or finger 36 which moves against the post 3-l when the perforated ear 32 has been forced from its siuiporting engagement with the oil'- set or seat by the sliding action of the previously-mentioned releasing or setting carriage, in the manner described. in, said former Letters Patent No. 1,068,38 l, so; as to bring the said moved releasing or setting carriage into its arrested p0SltlO11,I1I1tll. released by the downward movement of the depressed keylever the parts also causes a rotaryfinotion of the proper actuated slide upon its rod or post 23, whereby the slide is brought into proper alinement to be'engaged andmoved in a downward direction by the engaging finger 20 connected with the respective lug'19 of the plate 18, during the downward moveinent of the previosly-mentioned rockframe.

The previously-mentioned recording or indicating disks, of which there may be any suitable number, are indicated by thereference-character37, the several disks, of which but two are shown in Fig. 1 of the drawings, being suitably spaced apart, and being loosely. and rotatably' mounted upon a laterally extending main shaft or red, as 38, and being adapted of independent or combined rotation upon said rod, in-either' direction, according to the actuation of the proper mechanism, either for adding'or subtracting purposes, as will be hereinafter more fully described. The main shaft or rod 38 is nonrotatably disposed in suitably formed bearing-members 39 which are suitably secured to and extend in upward directions from the base-plate 1. Permanently afiixed to the hub of each disk 37 are a pair of disk or wheel-like members 40. and L1, the member 40 being provided with inverted V-. shaped teeth, as 42, extending from its peipheral edge-portions, and the other memper e1 having extending in radiallines from its circumferential edge, a series of suitably disposed fingers or projections, as 51:3,tl3e

said members 41 serving as prime novcrs' forward or backward direction 'as may be This actionahd engagement of desired. Pivotally mounted upon the said laterally nrtendingmain shaft or rod 88, at sidedaces oi. the respective disk or wheellilre members 41, are suitably formed arms in levers, as l i. each arm or lever being provided with a perforated ear or lug 45. Pivotally connectedwith each ear or lug 4:5, by means of a pin46, is a link 47, each link 47 being pivotally attached. at its opposite endportion, by means of a pin 48, to a long lever oriarm 49. These levers or arms 49 which, of course, correspond in number to the number of indicating or recording disks 8?, are pivotally mounted at their rear endportions upon a laterally extending rod 50, supported ,in suita Jly disposed bearingmembers 51 which extend upwardly from the base-plate 1. Each arm or lever 49 .is provided, near its point of pivotal-support, with a projection or pin 52 with which is operatively connected the one end-portion 54 of a coiled spring 53, each spring encircling the said laterally extending rod 50, and having its other free end-portion 55 extending in a downward direction and suitably secured to a bar or plate, as 56, which extends laterally between and is suitably secured at its end-portions to the said bearing-members The purposes of these springs 53, as will be evident, is to return the actuated parts to their normal initial positions, after the said arms or levers a9. and parts connected therewith have been released and have served their purposes. If desired, each arm or lever 49 may also be provided with a leaf-spring, as 57, having a portion thereof bearing directly upon the pivotal connection of the link 4L7 and the lever or arm ll), so as to take up any late :11 play, and also to prevent any accidental separation of the said parts. At their forward end-portions, the sail levers or arms 4-9 are each provided with finger-like extremities or members, as 58, which are adapted to be engaged, for

downward depressiomby the laterally eX-t tending lugs 30 of the respective slides 25 upon the posts 23,- when the. lug of the re spective slide has been brought into proper alinen'ient with such linger-like extremity or member 58., and when the said alined slide is bein moved in its downward direction upon the post 23 by the actuated rock-frame hereinbefore mentioned.

livotally mounted upon the side of each arm or lever 49, by means ot a pin or pivot t. is a suitably constructed gravity dog, as 60. the lower portion of which is made with an enlarged or suitably weighted part 61, which by its weight. under certain conditions, pioduces a slight pivotal or swinging movement oi the said dog. for the purposes to be presently more fully specified. The said dog (3 0 is also made with a slotted part, as U"). so as to provide two guiding edges 63 and (El, and projecting in an upward direc- 69 which formed with an arc-shaped portion 70 terminating at its free end-portion in a hook-like member 71, the inner curved marginal edge-portion T2 of said portion 70, and the inner marginal edgdportion 73 of said hook-like member 71 being adapted, at predetermined. times, to be brought into sliding and operative engagement with a later ally extending pin 0 projection 75 upon the .endportion 76 of an arm or lever 7st, said. arm or lever being suitably fixed by means of its hub 7. and screw 78, or in any other suitable manner, upon a rod '79 which tends between and is rotatably mounted in bearing-portions of the previously-nientioned bearing-members 51, said rod having a slight oscillatory movement in the said bearirig-portions of said member 51. The pivotal or swinging movement of the said swing-member or element 69 is limited by a stud or pin 80 which projects from the side of the arm or lever 4: and extends into an elongated opening 81 with which the mem ber 69 is provided. Extending from the said member 69 is another arm-like member or element, as 82, the tree end-portion of which is bent at an angle, as at 83, so as to term a pull-piece, which is normally out of engagement with the fingers or projections 413 of the disk or wheel-blue member or element 41, but which is adapted to immediately pass between two of said lingers or projections 48, as soon as the machine is operated. Extending from the outer convex marginal edge-portion of the portion 70 of th swingn'iember or element 9 is an extension 8-1 having a bent part 85 which is provided with a pin or projection 86 over which the holding portion (36 of the arm or finger-like member (35 of the gravity dog 60 rests, under normal conditions, the pivotal movement of the dog (30 and consequent downward movcits forward direction, or in the direction of the arrow 3 in said Fig. 4 of the drawings. At the same time, the corresponding movement of the long arm or lever 49, in carrying the gravity-dog 60 with it, brings the angularly bent portion 66 of the arm or fingerlike projection .65 of the gravity-dog firmly into a downward pressing engagement with the pin or projection 86 of the extension 84 of the swing-member or element 69, and owing to the arrangement of the elongated opening 81 allowing the swing-member or element to swing slightly upon the pivot or pin 68, independent of the movement of the arm or lever 44. This independent movement of the said swing-member or element 69, as will be evident, will force the angularly bent portion 83 of the arm-like member or element 82 down between two of the fingers or projections 43 of the disk or wheellike element 41, into holding engagement therewith, so that the combined movement of the arms or levers 49 and 44, and of the swing-member or element 69, will rotate the said disk or wheel-like member 41 and the indicating disk 37 in its forward direction,

or in the direction of the arrow 7 in said Fig. 4. At the same time, the finger or projection 75 of the pivoted arm or lever 74 rides upon the marginal edge-portion 72 of the portion 70 of the swing-member or element 69, and according to the degree of the depression of the key-lever 5 also into the hook-shaped portion, without effecting the forward movements of the said parts, until an off-set 88 upon an extension 87 with which :the key-lever 5 is provided strikes a rock frame 89 adapted to swing upon pintles 90 carried by bearing-brackets 91 mounted upon the base-plate 1., This rock-frame 89 consists, essentially, of a cross-plate or bar 92,

' with which said off-set 88 is adapted to be brought into engagement, and a pair of rearwardly extending side-bars or members 93 by means of which the said rock-frame is pivotally mounted upon the said pintles 90. Slidably arranged upon the outer side of one of the. said side-bars or members 93, for

- .the purposes hereinafter more fully stated.

is a plate or bar 94, said plate having a pair of elongated'openings 95, and the side-bar or member 93 being provided with corresponding guide-pins-96, one of which is headed, as at 97, to prevent displacement, but still permit of the sliding movement of said plate or bar 94, as will ,be'evident. Suitably secured upon the previously mentioned rod 79, by means of a screw 98, or other suitable fastening means, is a crank-like element, as

99, which extends down the outer side of the said plate or bar 94, and is provided with an off-set 100 and a slot 101, substantially as shown in Figs. 7 and 8 of the drawings. Extending from the'side of the said plate or bar 94'is a lug or projection, as 102, which, as the off-set 88 of the extension 87 of the depressed key-lever 5 is brought down upon the cross-plate or bar of the rock-frame 89, causes said lugor projection 102 to forcibly move against the off-set 100 of the cranklike element 99, so as to produce a slight but quick movement of the arm or lever 74 in the direction of the arrow 4) indicated in Fig. 4 of the drawings. This movement of the arm or lever 74 in the direction of the said arrow 41, causes the pin or projection of the arm or lever 74 to kick againstthe curved marginal edge-portion 72 of the swing-member or element 69, so that the angular-1y bent portion 83 of the arm-like member or element 82 will be removed from its operative engagement with the fingers or projections 43 of the disk or wheel-like element 41, leaving the indicating or record ing disk 37 and the disk or wheel-like member 41 in their forwardly rotated positions, while the levers or arms and their parts are returned to their normal initial positions by the action of the spring 53, as soon as the pressure is removed from the depressed keylever 5 which is also returned to its normal initial position by the spring 8 connected with the said key-lever 5.

In Fig. 9 of the drawings, we haveshown one means for returning the shaft or rod 7 9 and the arms or levers to their normal initial positions, said means consisting essentially of a collar, as 104, which is secured to said shaft or rod by means of a screw 105, or other suitable fastening means, said collar 104 being provided with a suitably formed spring-plate 1.05 which bears bymeans of its free endportion upon anarm or stud, as 107, pivotally secured to one of the 'main bearlng-meuibers 39 by means of' a pivot-pin 108, and the free end 109 of said arm or stud 107 being caused to constantly exert an upward pressure against the endportion 100 of the spring-plate by the action of-a spring 110 which encircles said pivot-pin 108, and has its respective endportions bearing upon a pair of pins or lugs 111 and 112 which project from the inner side of the bearing-member 39. The upward movement, of the said spring-plate 105 is limited by bearing upon a laterally extending bar or plate 113 which is arranged between the' two main bearing-members 39, said bar or plate 113 being carried by suitably formed bracket-like members or elements 114 which are secured to the said bearing-members 89 by means of screws 115,

or in any other suitable manner.

has been depressed by the operator.

eating or recording disks 37 and the disk orposts 23 to the desired depths', and whereby,

by means of. the intermediately disposed disk-operating mechanism is correspondingly controlled, to move the disks 37 only the necessary distance that may be desired.

In order to prevent the overthrow of the actuated disks 37 intheir indicating or recording positions, after the full depression of the key-lever 5 and rotation of the disk, the base-plate 1 is provided with another set of bearing-members 116 having pintles or pins 117 upon which is pivotally mounted another rock-frame. This rock-frame consists, essentially, of a cross-bar or plate 118 and a pair of rearwardly extending side-bars 120 which are adapted to oscillate upon said 123 which are vertically disposed in the pins 117 and are provided at their free ends with upwardly extending portions 121. To produce the oscillation of said rock-frame, the extensions 87 of the key-levers 5 are provided with ofl'-sets 122 which are adapted to bear down upon the cross-bar or plate 118, and thereby correspondingly raise the upwardly extending portions 121 of the sidebars 120. The upward movement of said portions 121, at the end of the downward stroke of the depressed key-lever 5, are brought into lifting engagement with the lower marginal edges of a plate or bar 122, having its ends slidably arranged in'slots main bearing-members 39, said plate or bar 122 being provided with upwardly projecting lugs or fingers 124 which are made to enter between two of the fingers or projections 13 of the disk or wheel-like member or element 41, at the end. of its rotation, see Fig. 5 of the drawings, and thereby prevents any further rotation of the said m'ember or element 41, as will be clearly evident. After the depressed key-lever is released, and returns to its normal initial position, the said rock-frame and the plate or bar 122 and its lugs or fingers 124 return by gravity to their initial positions, as will be clearly understood from an inspection of the drawings.

Having in the foregoing set forth the mechanism at 3 manner of actuating the recording or indicating disks as to move them in a forward direction, or in the dibackward direction, or in the direction of the arrow 2 for subtractingpurposes.

Referring now more particularly to Figs. 7 and 8 of the drawings, it will be seen that the previously-mentioned plate or bar 91 which, as has been stated, is slidably disposed upon one of the side-bars or members 93 of the rock-frame 89, has pivotally connected therewith, by means of a pivotstud 125, a link 126. Extending upwardly from the base-plate 1 of the machine, is a post 127, said post being formed with elongated openings, as 128. upon the side of said post 127 is a stern 129, said stem being provided with headed pins or studs 129 which are movably disposed" in said elongated openings 128, to permit of the slidable movement of said stem 129 upon said post 127. It will be understood, however, that the said stem 129 may otherwise be slidably connected with said post 127, if desired. The upper endportion of the stem 129 extends above the said post 127 and is provided upon its free end with a suitably formed finger-piece 130 for depressing the said stem 129.. Pivotally Slidably secured mounted upon a pivot-stud or pin 133 extending from a bearing-bracket 131 which is suitably mounted upon the bed-plate 1, by means of a screw 132, or other suitable fastening means, is a bell-crank 134. The said bell-crank has a forwardly projecting arm-like member 135 having a slotted endportion 136 by means of which it is operatively connected with a stud or projection 137 with which the lower end-portion of the said stem' 129 is provided. The said bell-crank 134 also has an upwardly extending arm-like member 138 which is pivotallv connected at its upper end-portion, by means of a pivot 139, to the previcmslymentioned link 126. From an inspection of said Figs. 7 and 8 of the drawings, it i will be clearly evident, that when the operator depresses the key-1ever.,-thus provided by the slidably disposed stem 129, the bellcrank 134 will be actuated, whereby the plate or bar 94 will be drawn suilieieutly in a forward direction, to cause a pin or projection 140 on said plate or bar 94 to enter into a slotted part 101 of the previously mentioned crank-like element 99 which is seeuredupon, the rod 79, in the manner illustrated in Fig. 8 of the drawings. The said plate or bar 91 is also provided with a slot or elongated opening. as 141, into and through which extends a pin 142 which projects laterally from the side-bar or member 93 of the rock-frame 89, said pin 112 having attached thereto the one end-portion of a coiled spring 143. The opposite end-portion of said spring-is secured to a pin 144 which projects laterally from the forward end-portion of the plate or bar 94, the said spring 143 becoming stretched when the stem 129 of the depressible key is depressed, and the purpose of said spring being to return the said actuated plate and bar 94 and the operated parts connected therewith to their normal initial positions, as soon as the downward pressure. has been released from the stem 129, as will be clearly evident.

In order that the said rock-frame 89 will be actuated, during the forward movement of the said plate or bar 94, before the depression and downward movements of any one of the digit-indicating key-levers 5 and the previously first-mentioned rock-frame, comprising the rearwardly extending arms 16 and the two laterally extending bars 17 and 18, the said plate or bar 94 has rigidly connected therewith, and secured thereto, in

any suitable manner, a finger 145, said finger extending in an upwarddirection and being provided upon its upper end-portion with an extension, as 146, formed with a marginal edge-portion 147 of a convex or other suitable configuration which moves against and rides upon a roller 148, rotatably' mounted upon a pin 149 which projects from the side of the arm 16 of the saidAlast-mentioned rock-frame. -To prevent any jamming of the said extension 146 with the -roller 148, due to the rapidity with which the machine might be operated, the baseplate 1 is provided near said post 127 with another post 150 having a pivot 151 upon which is mounted a stop-dog 152, held in the positions shown in the drawings by the end-arms of a spring 153, and against the stop-edge 154 of which stop-dog 152, the marginal edge 155 of the extension 146 of thefinger 145 is adapted to be brought,

when the parts are operated for the purposes herein-above stated.

It will be noticed from Fig. 8, that the forward portion of therock-frame 89 is raised when the extension 146 is caused to ride over the roller 148. The reason for this is that the springs 8 keep the bar 16 raised, the power exerted by said springs 8 being much stronger than the yielding action of the plate or bar 94 and its finger 145,

In using the machine for the purpose of subtracting, the corresponding slide 25 is first properly set upon its vertical post, according to which one of the indicating or digit-bearing key-levers 5 and the recording or indicating wheel or disk is to be rotated in a backward direction, by the laterally moved releasing or setting carriage, in the manner described in said'former. Letters .129 is depressed by of its fingerpiece, so as to move the said plate or bar 94 in its forward direction. This forward movement of the said plate or bar 94 moves the pin or projection 140 into the slotted part 101 of the crank-like element 99, the parts being retained in these relative positions as long as the operatorpresses downwardly upon the finger-piece 130. At the same time the convex marginal edge-portion 147 of the extension 146 of the finger 145 is caused to ride or move over.the roller 148, as indicated in Fig. 8 of the drawings, whereby the forward portion of the rock frame '89 is moved in an upward direction, so and the rear portion of said rock-frame is moved in a downward direction, its downward movement being limited by a downwardly extending stop-bar or foot 156 which is brought into engagement with the bed-plate 1. During the subtracting opera tion, when a key-lever 5 is depressed, the off-set 88 is brought intoengagement with the cross-plate or bar 92, so as to move the forward end of the bar or plate 94in a downward direction, and its rear end in an upward direction, in. the same manner as during the addition operation. The pin or projection 140, as has been stated, having been previously moved into the slotted part 95 101 of the crank-like element 99, produces a sufficient rock-motion of said crank-like element 99, and the latter being rigidly fixed to the previously-mentioned rod 79, causes .the latter also to receive a corresponding rock or rotary motion in its bearing-portions in which it is mounted, but in a direction opposite from that, during the adding operation. This rock or rotary motion of the said rod 79, as will be evident, produces 105 a corresponding movement of the arm or lever 74, also fixed upon the said rod 79, in a forward direction, thereby forcing a rearwardly projecting stud-like extension or heel 157 against the previously-mentioned pin or projection 67 of the gravity dog 60. A sudden or slight movement of the gravity dog upon its pin or pivot 59 is produced in consequence of such contact of the extension or heel 157 with the pin or projection 67, so that the angularly bent holding portion ()6 of the arm or finger-like projection is thrown out of its position for engagement with the pin or projection 86 of the swingmember or element 69, and so that the angularly bent portion 83 of the arm-like member S2 \vill remain in its normal position above and out of its active engagement with the fingers or projections 43 of the dish or wheel-like element 41.

The desired digit-bearing key-lever 5 is now depressed, whereby,in the manner here iii-before stated, the mechanism which is actuated by the downward rotary motion of the long arm or lever 49 is caused to move I in a forward direction to the positions indicated in Fig. 6 of the drawings, the angularly ben ortion 83 ot the arm-like member 89 mo ing in an arc-shaped path, above the fingers or projections 4.3 of the disk or wheel-like clement -11, so that the latter and the indlca v or immovable. At the end of the downm ard stroke of the digit-bearing key-lever 0, however, the action of the arm or lever 'l' i such that the laterally extending pin or projection of said arm or lever 74: will bear directly upon the marginal edge-portion 159 of the member 158 of tlie ii of the swing-member or element 69, w by said swmganember or element 69 re es a 5111110161113 pivotal movement which hr] the angularly bent hook-like member portion 83 of the arm-like member 82 down. into operative engagement between a pair.

of the fingers or projections i3 of the disk or wheel-like element il, directly below said portion 83, as clearly indicated in said Fig, 6 of the drawings, with the result, that upon the release of the depressed key-lever 5 by the operator, the said disk or wheel-like ele ment ll and the recording or indicating disk 37 will move backward, or in the direction of the arrow .2, shown in said Fig. 6, so that the disk 37, instead of being used as an adding disk, will serve as a subtracting disk. As soon as the digit-bearing keylever 5, and the other actuated devices and parts have returned to their normal initial positions, the mechanism can again be used either for adding or subtracting purposes, as may be desired.

To positively prevent any rotary movement of the disk 3?, during the subtracting operations of the mechanism, and while the mechanism is moving in a forwardirection without being brought into operative en-' sidebars 120 provided with the upwardly extending lifting portions 121, is provided. This rock frame, as has been stated, is pivotally mounted between the bearing-memhere 116, and to tilt the said rock-frame and bring the said lifting portions 121 thereof in lifting engagement with the lifting bar or plate 122 and its retaining lug or finger 124: between the lower two of the fingers or projections of the disk or wheel-like element 41, as indicated in Fig. 5 of the drawings, the base-plate 1 is provided at the proper place with av bearing-portion 160 which is provided with a pivot pin 161.

-Pivotally mounted upon this pin 161 is an oscillating lever 162, comprising two armor recording disk 37 will rethe other arm-pm-tion 16 lbcing provided with a foot or stop-piece 166 which for the purpose oi lin'iiting the downward movement of the said arn1-portion 161, and in consequence thereof the entire inoven'icnt of the said oscillating lever 162. As shown, the slidable plate or bar 9-1- is also provided upon. its inner surface, and at a point near the said curved end-portion 105 of said arm-portion 163, with a laterally extending pinor projection, as 167, which during the forward movement of the said bar or plate {ll is caused to move directly over the said curved end-portion 165 of the arm-portion 163, so to move said arm-portion 1655 in a downward direction, and the said. arn'iportion 16 in an upward direction. as will be clearly evident. The rcsult is that the free end-portion 168 of the arm-portion164-, which lies directly beneath one ofthe sido bars 120, will raise said side-bars Suiiicicntly,

and cause the upwardly extending portions 121 of said side-bars to lift the plate or bar and bring the proper upwardly projcct ing lug or finger 12 into its retaining or holding engagement with the two lowermost fingers or projections 13 of the disk or wheel-like element d1, so that the latter and the corresponding indicating .or recording disk 37 can not be rotated. After the depressed key-lever 5 is released, and returns to its normal initial position, the said lastmentioned rock-frame, as well as the oscillating lever 162, while the disk or wheel-like element lland the recording or indicating disk 37 are being moved backward, or in the direction of the arrow z, shown in Fig. 6, in the manner hereinbeit'ore set forth, will. also return automaticallyto their normal initial positions, when the n'iaohine is again ready for the next adding or subtracting operation, that may be necessary or desired.

From the foregoing description of the present invention, it will be clearly evident that an operative and eflicient apparatus or machine has been produced which is adapted for use as a combined adding and subtracting machine, or which may be put to the independent uses of adding or of subtracting, as may be desired by the operator, and in which the number of the parts has been of the same, without departing from he scope of the present invention as set fortl in the foregoing specification, and as defined in the clauses of the claim which are appen ed to the said specification. Hence, we do liot with the recording or, indicating disk to rotate the latter in a forward direction, and an auxiliary means cooperating with said key-lever acting independent of the said downward strokef the key-lev'erfor maintaining the disengagement of the disk-opcrating mechanism during the downward stroke of the said key-lever, but causing the engagement of said mechanism with the recording orindicating disk at the end of the downward stroke of the key-lever and ro-' tating the recording or indicating disk in a rearward direction during the return stroke of the key-lever.

2. In a machine of the character specified, in combination with a depre ssible key-lever, a rotatably arranged recording or indicating disk, means adapted to be actuated by a depressed key-lever for holding said disk against movement at the end of the-stroke of the key-lever, a disk-operating mechanism adapted to be actuated during the downward stroke of the key-lever and thrown into ,en-

gagement with the. recording or indicating disk to rotate the latter in a forwarddirection, and an auxiliary -means cotiperating with said key-lever acting independent of the said downward stroke of the key-lever for maintaining the disengagement of the disk-operating mechanism during the down ward strokeof the said key-lever, but causing the engagement of said mechanism with the recording or indicating disk at the end of the downward stroke of the key-lever and rotating the recording or indicating disk in a rearward direction during the return stroke of the key-lever.

3. In a machine ofthe-character specified, in combination with a depressible key-lever, a rotatably arranged recording or indicating disk, a disk-operating mechanism adapted to be actuated during the downward stroke of the key-lever and thrown into engagement with the recording or indicating disk to ro.

tate the latter in a forward direction, a releasing or setting means adapted to be brought into engagement with said disk-op- ,cooperating with said key-lever acting independent of the'said downward stroke of the key-lever for maintaining the disengagw .erating mechanism, and an auxiliary means ment of the disk-operating mechanism .dur: ing the downward stroke of the said keylever, but causing the engagement of said mechanism with the-recording or indicating disk at the end of the downward stroke-of the key-lever and rotating the recording or indicating disk in a rearwarddirection during the return-stroke of thekey-lever.

4'. In a machine of the character specified, in combination with a dep'ressible key-lever, a rotatably arranged recording or indicating disk, means adapted to be actuated by a-de-.

adapted tobe operated during the downward stroke of the key-lever and thrown into engagement with therecording or indicating disk. torotate the latter in a forward direction, a releasing or setting means adapted to be brought-into engagement with said diskpressed key-lever ,for holding said, disk y against movement at the end of the stroke of the key-lever, a disk-operating mechanism- 30 I operating mechanism, and an gaai xiliary means cooperating with said key-let er acting independent of the said f'downward stroke of the key-lever for maintaining the disengagementof the disk-operating mechanism during the downward stroke of the keylever, but causing the engagement of said E 1nechanis1n with the recording or indicatingdisk at the end of the downward stroke of the key-lever and rotating the recording or indicating disk in a rearward direction during the return-stroke of the key lever.

5. In a machine of the character specified,

in combinationwith a depressible key-lever, a rotatably arranged recording or 1ndicating disk, and a peripherally-toothed wheellike member coiiperating with said recording or indicating disk to rotate the'latter, an operating mechanism adapted to be actuated during the downward stroke of the key-lever, said mechanism comprising a pivotally-disposed and spring-controlled lever adapted to be actuated by the downward stroke of the key-lever, a pivotally mounted arm, a link-connection between said arm andsaid lever, a swing-member pivotally connected with said arm, a pull-arm connected with said swing-member, an oscillatory lever in engagement with said swing-member for producing the active engagement of said pull-arm with the peripheral teeth of. said wheel-like member during the downward stroke of the key-lever'to rotate said wheellike member and the record ng or 1n'd1cat-- ing disk in a forward directlon, and .means cooperating with said key-lever and the said oscillatory lever for maintaining thedisengagement of said pull-arm with the peripheral teeth of said wheel-like'memberduring the downward stroke of thekey-lever,

but causing the engagement of said pull-- arm with the peripheral teeth of said Wheellike member at the end of the downward stroke of the key-lever and rotating said wheel-like member and the recording or ining disk, and a peripherally-toothed wheelv like member cooperating with said record-' ing or indicating 'diskto rotate the latter, an operating mechanism adapted to be actuated during the downward stroke of the key-lever, said mechanism comprising a pivotally disposed and spring controlled lever adapted to be actuated by the downward stroke of the key-lever, a pivotally mounted arm, a link-connection between said arm and said lever, a swingmember pivotally connected with said arm, a pull-arm connected with {said swing- .member, an oscillatory lever in engagement with said swing-member for producing the active engagement of said pull-arm with the peripheral teeth of said wheel-like member during the downward stroke of the key-lever to rotate said wheel-like member and the recording or indicating disk in a forward direction, and means cooperating with said key-lever and the said oscillatory lever for maintaining the disengagement of said ullarm with the peripheral teeth of said w eellike member during the downward stroke of the key-lever, but causing the engagement of said pull-arm with the peripheral teeth of said wheel-like member at the end of the downward stroke of the key-lever and rotating said wheel-like member' and the recording or indicating disk in a rea ward direction during the return-stroke o the keylever, and means adapted to be actuated by the depressed key-lever for holding the recording or indicating disk againstmovement at the end of the stroke of the keylever.

7 In a'machine of the character specified, in combination with a depressible key-lever, a rotatably arranged recording or indicating disk, and a peripherally-toothed wheel-like member cooperating with said recording or indicating disk to rotate the latter, an.opcrating mechanism adapted to be actuated during the downward stroke of the key-lever, said mechanism comprising a pivotallydisposed and spring-controlled lever adapted to be actuated by the downward stroke of the key-lever, a pivotally mounted arm, a link-connectionbetween said arm and said lever, a swing-member pivotally connected with said arm, a pull-arm connected with said swing-member, a releasing or setting means adapted to be brought into engagement with said pivotally disposed and spring-controlled lever for actuating said lever during the downward stroke of the key-lever, an oscillatory lever in engagement with said swing-member for producing the active engagement of said pull-arm with the peripheral teeth of said wheel-like member during the downward strokeof the keylever to rotate said wheel-like member and the recording or indicating dislo in a forward direction, and meanscooperating with said key-lever and the said oscillatory lever for maintaining the disengagement of said pull-arm with the peripheral teeth of said wheel-like member during the downward stroke, of the key-lever, but causing the engagement of said P1111!- arm with the peripheral teeth of said wheel-like member at the end of the downward stroke ofthe keylever and rotating said wheel-like member and the recording or indicating disk in a rearward direction during the return-stroke of the key-lever.

8. In a machine of the character specified, in combination with a depressible key-lever, a rotatably arranged rccordin or indicating disk, and a peripherally-toot ed wheel-like member coiiperating with said recording or indicating disk to rotate the latter, an operating mechanism adapted to be actuated during the downward stroke of the keylever, said mechanism comprising a pivotally-disposed and' spring-controlled lever ada ted to be actuated by' the downward s'tro e of the key-lever, a pivotally mounted arm, a link-connection between said arm and said lever, a swing-member pivotally con-- nected withsaid arm, a pull-arm connected with said swing-member, a releasing "or setting means adapted to be brought into engagement with said pivotally disposed and spring-controlled lever for actuating said lever during the downward stroke of the key-lever, an oscillatory lever in engagement with said spring-member for producing the active engagement of said pull-arm with the peripheral teeth of said wheel-like member during the downward stroke of the key-lever to rotate said wheel-like member and the recording or'indic'ating disk in a forward direction, and means cooperating with said key-lever'and the said oscillatory lever for maintaining the disengagement of said pull-arm with the peripheral teeth of said wheel-like member during the downward stroke of the key-lever, but causing the engagement of said pull-arm with the peripheral teeth of said wheel-like member at the end of the downward stroke of the key-lever and rotating said wheel-like member and the recording or indicating disk in a rearward direction during the returnstroke of the key-lever, and means adapted to be actuated by the depressed key-lever for holding the recording or indicating, disk agamst movement at the end of the stroke of the-key-lever.

9. In a machine of the character specifiiad,

in combination with a depressible key=levier, a rotatably arranged recording or indic msaoae ing disk, a disk-operating mechanism adapted to be actuated during the downward stroke of the key-lever, a rock-frame adapted to be actuated by the downward stroke of the key-lever, an osciliatory shaft and means mounted upon said shaft for throw-- ing the disk-operating mechanism into active engagement with said recording or indicating disk, and a crank-like element also mounted upon said shaft for oscillating the latter, said crank-like element being pro vided with an engaging ofl-set, a slideplate slidably connected with said rock-frame, said plate being adapted to be brought into engagement with said cit-set for oscillating said shaft in a forward direction, said crank-like element being also provided with a slotted portion, a pin extending from said slide-plate, said pin being adapted to enter said slotted portion of the crank-like element when said slide-plate is moved in a forward direction for oscillating said shaft in a rearward direction, andrneans connected with said slide-plate for producing a sliding movement of said plate in a forward direction.

10. In a machine of the character specitied, in combination with a depressible keylever, a rotatably arranged recording or indicating disk, a disk-operating mechanism ada ted to be actuated din-in the down- P v a ward stroke of the key-lever, a rock-frame adapted to be actuated by the downward stroke of the key-lever, an oscillatory shaft and means mounted upon said shaft for throwing the disk-operating mechanism into active engagement with said recording or indicatingdisk, and a crank-like element also mounted upon said shaft for oscillating the latter, said crank-like element being provided with an en agi-ng off-set, a slide-plate a sliding movement of said plate in a forwarddireotion, consisting of a vertically slidable stem, a bell-crank pivotally connected with said stem, and a link between said bell-crank and said slide-plate.

In testimony, that we claim the invention set forth above we have hereunto set our hands this 2nd day of December, 1912.

I LEVI l. DARBY.

CHARLES N. WALSH.

Witnesses:

Fnnnn. C. FRAENTZEL, Fnnnx, H. W. FRAENTZEL. 

